Saturday, March 4, 2017

Types of Network Topology

Network topology describes the layout or appearance of a network that is, how the computers, cables, and other components within a data communication network are interconnected, both physically and logically. Network topology can also be described as the virtual structure of the network and also known as network architecture.

Devices in the network are known as nodes and the connections between the nodes are knows as links.

The physical topology describes the way in which a network is physically laid out, and the logical topology describes how data actually flow through the network.

The topology of a network is the geometric representation of the relationship of all the links connecting the devices.

There are following types of topologies:

1.    Mesh topology
2.    Star topology
3.    Bus topology
4.    Ring topology
5.    Tree topology
6.    Hybrid topology

There exist two types of relationships among the different topologies:

1.    Peer to peer
2.    Primary-secondary

Peer to peer is the relationship where the devices share the link equally. The examples are ring and mesh topologies. In Primary-secondary relationship, one device controls and the other devices have to transmit through it. For example, star and tree topologies.

Following factors should be taken into consideration while choosing a network topology:

1.    Number of nodes/terminals and users in the network.
2.    Bandwidth required by the network to transfer the data over the network.
3.    The financial involved in building the network.
4.    If exist an existing network, knowledge of previous architecture, topology, network components, network operating system to be transformed to new topology.
5.    Functionalities required over the network, i.e. internet access, file sharing, printer sharing, etc.
6.    Security parameters for data backup and to prevent unauthorized access.
7.    Regular monitoring and maintenance of the network.
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